By Texas Instruments 79
Texas Instruments' DRV8881 are bipolar stepper or brushed-DC motor drivers for industrial applications. The device output stage consists of two N-channel power MOSFET H-bridge drivers. The DRV8881 are capable of driving up to 2.5 A peak current or 1.4 ARMS current per H-bridge (with proper PCB ground plane for thermal dissipation and at 24 V and TA = 25°C).
AutoTune™ automatically tunes motors for optimal current-regulation performance and compensates for motor variation and aging effects. AutoTune is available on the DRV8881E. Additionally, slow, fast, and mixed decay modes are available.
The PH/EN (DRV8881E) or PWM (DRV8881P) pins provide a simple control interface. An internal sense amplifier allows for adjustable current control. A low-power sleep mode is provided for very-low quiescent current standby using a dedicated nSLEEP pin.
Internal protection functions are provided for under-voltage, charge pump faults, over-current, short circuits, and over-temperature. Fault conditions are indicated by an nFAULT pin.
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